Fuel-supply device.



ammmtoz R. H. coma. FUEL SUPPLY DEVICE.

APPLICATION FILiD DEC. 16. 19KB.

Patented Oct. 23, 1917.

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RICHARD H. COBB, F CLEVELAND, OHIO.

FUEL-SUPPLY DEVICE.

Specification of Letters Patent. Patented, @0 33, 23, 191*? Applicationfiled December 16, 1916. Serial 1t 0. 137,319.

To all whom it may concern:

Be it known that I, RICHARD H. COBB, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain new and useful Improvements in FueLSupply Devices, ofwhich the followingis a specification.

This invention relates to fuel supply devices for internal combustionengines. It has for its principal object to provide means whereby thepressure from the compression stroke and the explosion stroke of anautomobile engine is utilized to relieve the vacuum created by theintake stroke of the engine, for causing the fuel to rise to a higherlevel from the supply tank and then flow by gravity to the carbureter.This is accomplished by simple mechanism, which operates efiicientlyirrespective of the speed of the engine.

With the above and other objects in view as will be understood, theinvention will be hereinafter fully described in connection with theaccompanying drawings, which simply illustrate the same, and the novelfeatures thereof will be distinctly pointed out in the appended claims.

In the drawings, like characters of referenoe indicate correspondingparts.

Figure 1 is a view of an internal combus tion engine showing theapplication of my device, and

Fig. 2 is a sectional elevation of the device.

Referring to the drawings, lrepresents an internal combustion engine ofany design having a plurality of cylinders indicated by 2. A carbureterof ordinary construction, designated by 3, is connected to the intake ofthe engine for supplying the proper mixture, and a supply tank 4:, forcontaining gasolene or other liquid fuel, is located in the usual mannerbelow the carburetor.

This invention consists of areservoir 5, which is provided with asuitable cover 6. Arranged within the reservoir, and depending from thecover is a receptacle 7. From the bottom of this inner receptacleextends an outlet elbow 8, the end of which is inclined and adapted tobe normally closed by a flap valve 9. Lugs and 11, on the cover andreservoir respectively, serve to support the same from the dash of anautomohile, indicated by 12. The reservoir 5 is provided with a centralbottom outlet 13, which is connected to L'necarhureter 3 by means of apipe 14. Aconduit connects the fuel supply tank 4 to an inlet valve 16,which is threaded into the cover;6lat 17, and extends within the innerreceptacle 7. Said inlet valve is adapted to allow the fuel to flow intothe receptacle 7 under certain conditions but will shut oficommunication therefrom to the supply tank at other times, as will behereinafter explained. The ball 18 of the inlet valve is held againstits seat under proper tensionby means of a coiled spring 19, which restsupon an adjusting nut 20 threaded in the inlet valve at 21. Thisadjusting nut isprovided with an opening 22 to permit the fuel to flowinto the receptacle 7. i

In this invention, a vacuum is created in the receptacle 7 by the intakestroke of the engine, for the purpose of allowing the fuel to flowtherein through the inlet valve 16, and pressure from the compressionstroke and the explosion stroke relieves this vacu' um, therebypermitting the fuel to pass through the outlet elbow 8 into thereservoir 5. Any cylinder of the engine is connected by means of a pipe23 to a pressure valve 24, which is threaded into the cover 6 at 25uandenters the receptacle 7. This pressure valve is provided with a seat 26at the upper end of its bore 27 for accommodating a check valve 28. Aguide pin 29 depends from the check valve and is encircled by a coiledspring 30, which supports the check valve and rests upon an adjustingnut 31 threaded in the bore 27. An apto exert the proper tension uponthe check valve, so that it will not close too quickly under pressure. Apin 33, arranged above the check valve, limits its movement in thatdirection. A uniform level of the fuel is maintained in the receptacle 7by means of a float 34, which is pivotally connected to its side at 35.This float is adapted to rise and fall with the level of the fuel. Inmoving upwardly, the float forces the shut-ofl' val e 36 against. theconical outlet 37 at the lower end of the bore 27, and when the floatmoves downwardly, said valve falls with it. The shut-off valve isslidably mounted in a bracket 38 fixed to the sideof the receptacle. Arelief valve 39 is hinged to open out wardly over a hole 40 in the cover6 to perpasscdthe check valve.

was

mit the escape of excessive pressure for safety. Air is admitted to thereservoir through a vent 11 in the cover.

Operation: It will be assumed that the piston in the engine cylinderconnected to the pressure valve 24 has just completed its exhauststroke, and that sufficient fuel has flowed from the supply tank 4:through the inlet valve 16 into the receptacle 7 to raise the float 3 1until it forces the shut off valve 36 to close the conical outlet 37 ofthe pressure valve. During the intake stroke, the check valve 28 isforced from its seat'by the coiled spring 30. The pressure of thecompression stroke and the explosion stroke will force the check valve28 back to its seat, but not until a certain amount of the pressure, atthe beginnin of the compression stroke and the explosion stroke, hasThis Will depend upon the tension of the coiled spring 30. Said pressurewill force the shut-elf valve 36 away from the conical outlet 37 of thepressure valve and enter the receptacle 7. The ball 18 of the inletvalve 16 will be forced against its seat and thereby prevent thepressure entering the fuel supply tank.

Should the pressure in the receptacle be excessive, the relief valve 39will allow it to escape without causing damage. The pressure, uponentering the receptacle, breaks the vacuum created by the intake stroke,

and the fuel flows therefrom through the outlet elbow 8 into thereservoir 5. During the intake stroke, the flap valve 9 will prevent thefuel from the reservoir being drawn up into the receptacle. The aboveoperations are repeated with each intake, compression and explosionstroke of the engine,

thereby'maintaining a uniform level ofthe fuel in the reservoirirrespective of the speed of the engine. Having fully described myinvention, what I claim is: v

1. In a fuel supply device for internal combustion engines, thecombination of a reservoir, a receptacle for receivin fuel,

valve for permitting fuel to flow rom the? bustion engines, thecombination of a reservoir, a receptacle for receiving fuel, a valve forpermitting fuel to flow from the receptacle into the reservoir andprevent its return, an inlet valve for admitting fuel to said receptacleand .adapted to be closed under pressure within the receptacle, meansestabits return, an inlet valve for admitting fuel to said receptacleand adapted to be closed under pressure within the receptacle, meansestablishing communication from a cylinder of the'engine to saidreceptacle, and means for preventing the sudden closin of said check.valve to allow some of sai pressure to enter said receptacle,substantially as described 4. In a fuel supply devicejor internalcombustion engines, the combination of a reservoir, a receptacleforFrec'eiving fuel, a valve for permitting fuel to flow from thereceptacle into the reservoir and prevent its return, an inlet valve foradmitting fuel to said receptacle and adapted to be closed underpressure Within the receptacle, means establishing communication from acylinder of the engine to said receptacle, a spring for preventing thesudden closing of said inlet valve, and means for adjusting the tensionof the spring, substantially as described.

5. Ina fuel supply device for internal combustion engines, thecombination of a reservoir, a receptacle for receiving fuel, a valve forpermitting fuel to How from the receptacle into the reservoir andprevent its return, an inlet valve for admitting fuel to. saidreceptacle and adapted to be closed under pressure within thereceptacle, a pressure valve fitted into said receptacle, meansestablishing communication from a cylinder of the engine to the pressurevalve, the pressure valve having an outlet, a shut-0E valve adapted toclose the outlet, a float in the receptacle for forcing the shut-oflvalve closed, and a check valve mounted in the pressure valve adapted toallow a small amount of pressure to pass thesame and then be closed bythe pressure, substantially as described.

6. In a fuel supply device for internal combustion engines, thecombination of a reservoir, a receptacle for receiving fuel, thereceptacle being arranged within the reservoir and in spaced relation toits bottom and walls, a valve in the bottom of the receptacle forpermiting fuel to flow from the receptacle into the reservoir andprevent its return, an inlet valve in the top of the receptacle foradmitting fuel thereto and adapted to be closed by air pressurewithin'm-unieation -frcm ,"tU' the pressure valve, the pressure valve havingan outlet to the receptacle, 2:, shut-efi 'valve adapted to close theoutlet, at float in the "receptiecleea; pfessure" Valve in the topof-the receptacle,

a cylinder of the engine the receptacle for forcing the shut-off -valveclosed when there is a, predetermined amount "of fuel in the receptacleand an air space means establishing comv ebove thefuel, a check valvemounted in the a, spring tentiing tokeep the check valve openand preventits ,suddeia closing by the pressure from the comprespressure valve,

slen stroke and. the explosion stroke 0f the engine, and a nut foradjusting the tension of seidjspring, substantially as described.

In testlmeny whereof I effix my signature.

' "RICHARD H. COBB

